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Fixes to the locking and rollback behavior. (CVS 261)

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FossilOrigin-Name: 337b3d3b2a903328d9744c111979909a284b8348
This commit is contained in:
drh
2001-09-23 02:35:53 +00:00
parent beae319476
commit ecdc7530dd
18 changed files with 504 additions and 339 deletions
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17
src/update.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: update.c,v 1.14 2001/09/16 00:13:27 drh Exp $
** $Id: update.c,v 1.15 2001/09/23 02:35:53 drh Exp $
*/
#include "sqliteInt.h"
@@ -34,12 +34,14 @@ void sqliteUpdate(
Index *pIdx; /* For looping over indices */
int nIdx; /* Number of indices that need updating */
int base; /* Index of first available table cursor */
sqlite *db; /* The database structure */
Index **apIdx = 0; /* An array of indices that need updating too */
int *aXRef = 0; /* aXRef[i] is the index in pChanges->a[] of the
** an expression for the i-th column of the table.
** aXRef[i]==-1 if the i-th column is not changed. */
if( pParse->nErr || sqlite_malloc_failed ) goto update_cleanup;
db = pParse->db;
/* Locate the table which we want to update. This table has to be
** put in an IdList structure because some of the subroutines we
@@ -49,7 +51,7 @@ void sqliteUpdate(
pTabList = sqliteIdListAppend(0, pTableName);
if( pTabList==0 ) goto update_cleanup;
for(i=0; i<pTabList->nId; i++){
pTabList->a[i].pTab = sqliteFindTable(pParse->db, pTabList->a[i].zName);
pTabList->a[i].pTab = sqliteFindTable(db, pTabList->a[i].zName);
if( pTabList->a[i].pTab==0 ){
sqliteSetString(&pParse->zErrMsg, "no such table: ",
pTabList->a[i].zName, 0);
@@ -132,9 +134,10 @@ void sqliteUpdate(
*/
v = sqliteGetVdbe(pParse);
if( v==0 ) goto update_cleanup;
if( (pParse->db->flags & SQLITE_InTrans)==0 ){
if( (db->flags & SQLITE_InTrans)==0 ){
sqliteVdbeAddOp(v, OP_Transaction, 0, 0, 0, 0);
sqliteVdbeAddOp(v, OP_VerifyCookie, pParse->db->schema_cookie, 0, 0, 0);
sqliteVdbeAddOp(v, OP_VerifyCookie, db->schema_cookie, 0, 0, 0);
pParse->schemaVerified = 1;
}
/* Begin the database scan
@@ -156,9 +159,9 @@ void sqliteUpdate(
*/
sqliteVdbeAddOp(v, OP_ListRewind, 0, 0, 0, 0);
base = pParse->nTab;
sqliteVdbeAddOp(v, OP_Open, base, pTab->tnum, 0, 0);
sqliteVdbeAddOp(v, OP_OpenWrite, base, pTab->tnum, 0, 0);
for(i=0; i<nIdx; i++){
sqliteVdbeAddOp(v, OP_Open, base+i+1, apIdx[i]->tnum, 0, 0);
sqliteVdbeAddOp(v, OP_OpenWrite, base+i+1, apIdx[i]->tnum, 0, 0);
}
/* Loop over every record that needs updating. We have to load
@@ -216,7 +219,7 @@ void sqliteUpdate(
*/
sqliteVdbeAddOp(v, OP_Goto, 0, addr, 0, 0);
sqliteVdbeAddOp(v, OP_ListClose, 0, 0, 0, end);
if( (pParse->db->flags & SQLITE_InTrans)==0 ){
if( (db->flags & SQLITE_InTrans)==0 ){
sqliteVdbeAddOp(v, OP_Commit, 0, 0, 0, 0);
}